Merge branch 'x86-setup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / drivers / media / video / cx25840 / cx25840-vbi.c
1 /* cx25840 VBI functions
2  *
3  * This program is free software; you can redistribute it and/or
4  * modify it under the terms of the GNU General Public License
5  * as published by the Free Software Foundation; either version 2
6  * of the License, or (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
16  */
17
18
19 #include <linux/videodev2.h>
20 #include <linux/i2c.h>
21 #include <media/v4l2-common.h>
22 #include <media/cx25840.h>
23
24 #include "cx25840-core.h"
25
26 static int odd_parity(u8 c)
27 {
28         c ^= (c >> 4);
29         c ^= (c >> 2);
30         c ^= (c >> 1);
31
32         return c & 1;
33 }
34
35 static int decode_vps(u8 * dst, u8 * p)
36 {
37         static const u8 biphase_tbl[] = {
38                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
39                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
40                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
41                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
42                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
43                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
44                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
45                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
46                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
47                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
48                 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
49                 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
50                 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
51                 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
52                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
53                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
54                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
55                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
56                 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
57                 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
58                 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
59                 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
60                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
61                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
62                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
63                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
64                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
65                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
66                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
67                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
68                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
69                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
70         };
71
72         u8 c, err = 0;
73         int i;
74
75         for (i = 0; i < 2 * 13; i += 2) {
76                 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
77                 c = (biphase_tbl[p[i + 1]] & 0xf) |
78                     ((biphase_tbl[p[i]] & 0xf) << 4);
79                 dst[i / 2] = c;
80         }
81
82         return err & 0xf0;
83 }
84
85 int cx25840_vbi_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
86 {
87         struct i2c_client *client = v4l2_get_subdevdata(sd);
88         struct cx25840_state *state = to_state(sd);
89         struct v4l2_sliced_vbi_format *svbi;
90         static const u16 lcr2vbi[] = {
91                 0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
92                 0, V4L2_SLICED_WSS_625, 0,      /* 4 */
93                 V4L2_SLICED_CAPTION_525,        /* 6 */
94                 0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
95                 0, 0, 0, 0
96         };
97         int is_pal = !(state->std & V4L2_STD_525_60);
98         int i;
99
100         if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
101                 return -EINVAL;
102         svbi = &fmt->fmt.sliced;
103         memset(svbi, 0, sizeof(*svbi));
104         /* we're done if raw VBI is active */
105         if ((cx25840_read(client, 0x404) & 0x10) == 0)
106                 return 0;
107
108         if (is_pal) {
109                 for (i = 7; i <= 23; i++) {
110                         u8 v = cx25840_read(client, 0x424 + i - 7);
111
112                         svbi->service_lines[0][i] = lcr2vbi[v >> 4];
113                         svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
114                         svbi->service_set |= svbi->service_lines[0][i] |
115                                              svbi->service_lines[1][i];
116                 }
117         } else {
118                 for (i = 10; i <= 21; i++) {
119                         u8 v = cx25840_read(client, 0x424 + i - 10);
120
121                         svbi->service_lines[0][i] = lcr2vbi[v >> 4];
122                         svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
123                         svbi->service_set |= svbi->service_lines[0][i] |
124                                              svbi->service_lines[1][i];
125                 }
126         }
127         return 0;
128 }
129
130 int cx25840_vbi_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
131 {
132         struct i2c_client *client = v4l2_get_subdevdata(sd);
133         struct cx25840_state *state = to_state(sd);
134         struct v4l2_sliced_vbi_format *svbi;
135         int is_pal = !(state->std & V4L2_STD_525_60);
136         int vbi_offset = is_pal ? 1 : 0;
137         int i, x;
138         u8 lcr[24];
139
140         if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE &&
141                         fmt->type != V4L2_BUF_TYPE_VBI_CAPTURE)
142                 return -EINVAL;
143         svbi = &fmt->fmt.sliced;
144         if (fmt->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
145                 /* raw VBI */
146                 memset(svbi, 0, sizeof(*svbi));
147
148                 /* Setup standard */
149                 cx25840_std_setup(client);
150
151                 /* VBI Offset */
152                 cx25840_write(client, 0x47f, vbi_offset);
153                 cx25840_write(client, 0x404, 0x2e);
154                 return 0;
155         }
156
157         for (x = 0; x <= 23; x++)
158                 lcr[x] = 0x00;
159
160         /* Setup standard */
161         cx25840_std_setup(client);
162
163         /* Sliced VBI */
164         cx25840_write(client, 0x404, 0x32);     /* Ancillary data */
165         cx25840_write(client, 0x406, 0x13);
166         cx25840_write(client, 0x47f, vbi_offset);
167
168         if (is_pal) {
169                 for (i = 0; i <= 6; i++)
170                         svbi->service_lines[0][i] =
171                                 svbi->service_lines[1][i] = 0;
172         } else {
173                 for (i = 0; i <= 9; i++)
174                         svbi->service_lines[0][i] =
175                                 svbi->service_lines[1][i] = 0;
176
177                 for (i = 22; i <= 23; i++)
178                         svbi->service_lines[0][i] =
179                                 svbi->service_lines[1][i] = 0;
180         }
181
182         for (i = 7; i <= 23; i++) {
183                 for (x = 0; x <= 1; x++) {
184                         switch (svbi->service_lines[1-x][i]) {
185                         case V4L2_SLICED_TELETEXT_B:
186                                 lcr[i] |= 1 << (4 * x);
187                                 break;
188                         case V4L2_SLICED_WSS_625:
189                                 lcr[i] |= 4 << (4 * x);
190                                 break;
191                         case V4L2_SLICED_CAPTION_525:
192                                 lcr[i] |= 6 << (4 * x);
193                                 break;
194                         case V4L2_SLICED_VPS:
195                                 lcr[i] |= 9 << (4 * x);
196                                 break;
197                         }
198                 }
199         }
200
201         if (is_pal) {
202                 for (x = 1, i = 0x424; i <= 0x434; i++, x++)
203                         cx25840_write(client, i, lcr[6 + x]);
204         } else {
205                 for (x = 1, i = 0x424; i <= 0x430; i++, x++)
206                         cx25840_write(client, i, lcr[9 + x]);
207                 for (i = 0x431; i <= 0x434; i++)
208                         cx25840_write(client, i, 0);
209         }
210
211         cx25840_write(client, 0x43c, 0x16);
212         cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22);
213         return 0;
214 }
215
216 int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi)
217 {
218         struct cx25840_state *state = to_state(sd);
219         u8 *p = vbi->p;
220         int id1, id2, l, err = 0;
221
222         if (p[0] || p[1] != 0xff || p[2] != 0xff ||
223                         (p[3] != 0x55 && p[3] != 0x91)) {
224                 vbi->line = vbi->type = 0;
225                 return 0;
226         }
227
228         p += 4;
229         id1 = p[-1];
230         id2 = p[0] & 0xf;
231         l = p[2] & 0x3f;
232         l += state->vbi_line_offset;
233         p += 4;
234
235         switch (id2) {
236         case 1:
237                 id2 = V4L2_SLICED_TELETEXT_B;
238                 break;
239         case 4:
240                 id2 = V4L2_SLICED_WSS_625;
241                 break;
242         case 6:
243                 id2 = V4L2_SLICED_CAPTION_525;
244                 err = !odd_parity(p[0]) || !odd_parity(p[1]);
245                 break;
246         case 9:
247                 id2 = V4L2_SLICED_VPS;
248                 if (decode_vps(p, p) != 0)
249                         err = 1;
250                 break;
251         default:
252                 id2 = 0;
253                 err = 1;
254                 break;
255         }
256
257         vbi->type = err ? 0 : id2;
258         vbi->line = err ? 0 : l;
259         vbi->is_second_field = err ? 0 : (id1 == 0x55);
260         vbi->p = p;
261         return 0;
262 }